Muzzle attachment for guns



Dec. 19, 1933. Q F. HOFSTETTER 1,939,700 y MUZZLE ATTACHMENT FOR GUNS Filed June 17, 1932 EEf-l- E larEncE F' Hnatetter WW. @LM

Attmrney Patented Dec. 19, 1933 NITED STATES PATENT oFFic Claims.

(Granted under the act of March 3, 1883, as amended April 30, 1928; 370 0. G. 757) The invention described herein may be manufactured and used by or for the Government for governmental purposes, without the payment to me of any royalty thereon.

5 This invention relates to a muzzle attachment for guns and more particularly it has reference to that class of attachments serving to check recoil, silence the report and conceal flash.

The principal object of the present invention is to provide a small and compact attachment especially suited for machine guns mounted on aircraft and capable of eiiiciently performing all of its intended functions.A

A further object is to provide a novel structure i6 that will facilitate assembly and mounting on the Fig. 4 is a view partly in side elevation and SG partly in longitudinal section of the adapter.

Referring to the drawing by characters of reference the attachment consists of a tubular body A, a sleeve B for the body, and an adapter.C whereby the unit is secured to the jacket D surrounding the gun barrel E.

The body A comprises a cylindrical tube 5 having a front end 6 and a rear end 7 of greater internal and external diameters to provide an annular recess 8 between the ends. The front e@ shoulder 9 is provided with an undercut recess 10 for receiving the beveled front end of the sleeve B which is assembled over the rear end 7 of the body and when in place projects beyond the rear end.u The annular recess 8 thus becomes a cham- A ber in which is placed a medium for absorbing and radiating heat. This medium is preferably in the form of a coil of wire 11 wrapped around the tube 5. The tube 5 is provided with a plurality of apertures 12 while the sleeve B is similarly provided with larger apertures 13 placed as close together as possible. The enlarged front end 6 of the body is also formed with several large apertures 14. Within the tube 5 are a series of baffle rings 15 whose center openings form the bullet passage.

The rearmost baffle ring 16 is formed on the front end 17 of the adapter C which is disposed within the rear end '7 of the bodyand is threadedly connected thereto as at 18 (Fig. l).

When the adapter andthe body A are coupled, a flange 19 on the adapter is brought up against the rear face of the body and has a projecting portion formed with an undercut recess 20 for confining the beveled rear end of the sleeve B.

The front end 17 of the adapter is connected 65 to the reduced` body portion 21 by an inclined shoulder 22 having a series of rearwardly inclined apertures 23. The rear edge of the body portion 21 is beveled as at 24 to facilitate mounting on the gun barrel E when the adapter is to be attached to the barrel jacket D through the threaded connection 25 (Fig. l).

As the projectile emerges from the gun and occupies the opening in the rearmost baiiie ring 16 the gases will be blocked off and, expanding in 75 the adapter, a portion will be vented through the -apertures 23. The reaction of the gases on the adapter will tend to exert a forward pressure on the non-recoiling elements of the gun and thereby produce a stabilizing influence on the gun mount. This action is supplemented when the remainder of the gases strike the baiiie rings, 15. These baille rings in opposing the forwardmovement of the gases induce their radial ow through the perforated wall of the body so that the coil 11 may function in absorbing heat and cooling the gases below the flashing point.

I claim.

1. A muzzle attachment for guns embodying an adapter securable to an element of a gun and having an inclined wall intermediate its ends with Y rearwardly directed apertures, a baffle lring on the forward end of the adapter, a ange on the adapter, a perforated tubular member having enlarged ends attached to the adapter, baille rings within the tubular member, a perforated sleeve embracing the tubular member and confined between the front end thereof and the ange on the adapter,` and a coil of wire wrapped around the tubular member inside the sleeve.

2. A muzzle attachment for guns embodying an adapter securable to an element of a gun and having rearwardly directed apertures, a baflie ring on the forward end of the adapter, a flange on the adapter,` a perforated tubular member having enlarged ends attached to the adapter, baiile rings within the tubular member, a perforated sleeve embracing the tubular member and confined between the front end thereof and the flange on the adapter, and a heat absorbing medium between the tubular member and the sleeve.

3. A muzzle attachment for guns embodying an adapter securable to an element of a gun and having rearwardly directed apertures, a baffle ring on the forward end of the adapter, a flange on the adapter, a perforated tubular member having enlarged ends attached to the adapter, a perforated sleeve embracing the tubular member and confined between the front end thereof and the flange on the adapter, and a heat absorbing member medium between the tubular member and the sleeve.

4. A muzzle attachment for guns embodying an adapter securable to an element of a gun, a

perforated tubular member having enlarged ends forated tubular member attachable to the.

adapter and having a front shoulder, a perforated sleeve confined between the front shoulder and the adapter, and a heat absorbing medium between the tubular member and the sleeve.

CLARENCE F. HOFSTETTER. 

